Hi all, A few weeks ago, Joe Groff challenged users on Twitter to create a Rational<T> type making use of the new integer protocols implemented for Swift 4. As it happens, I'd already started a project to try out these new number protocols. Now that I think the most embarrassing bugs have been squashed in that project, I thought I'd share it here in case anyone else might find it useful.
NumericAnnex <https://github.com/xwu/NumericAnnex> is meant to supplement the standard library's numerics facilities in Swift 4. At the moment, it provides: * Extensions to BinaryInteger for GCD, LCM, and exponentiation * Protocols Math (refines SignedNumeric), Real (refines Math and FloatingPoint), and PRNG (refines Sequence and IteratorProtocol) * Types Complex<T>, Rational<T>, and Random Documentation is available at <https://xwu.github.io/NumericAnnex/>. I'd love to hear feedback. I'll follow up shortly on Swift Evolution with some thoughts on future improvements to integer protocols based on this experience.
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